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KASAN: wild-memory-access Read of size 105

Status: closed as invalid on 2017/10/18 09:01
First crash: 2390d, last: 2390d

Sample crash report:
BUG: KASAN: wild-memory-access on address ffe708746f867000
Read of size 105 by task syz-executor5/5041
CPU: 1 PID: 5041 Comm: syz-executor5 Not tainted 4.9.52-g96a28fc #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cea4fae8 ffffffff81d93149 ffe708746f867000 0000000000000069
 0000000000000000 ffff8801c968ea20 ffe708746f867000 ffff8801cea4fb70
 ffffffff8153d08f 0000000000000000 0000000000000001 ffffffff826648db
Call Trace:
 [<ffffffff81d93149>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d93149>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d08f>] kasan_report_error mm/kasan/report.c:284 [inline]
 [<ffffffff8153d08f>] kasan_report.part.1+0x40f/0x500 mm/kasan/report.c:309
 [<ffffffff8153d460>] kasan_report+0x20/0x30 mm/kasan/report.c:296
 [<ffffffff8153bda7>] check_memory_region_inline mm/kasan/kasan.c:308 [inline]
 [<ffffffff8153bda7>] check_memory_region+0x137/0x190 mm/kasan/kasan.c:315
 [<ffffffff8153be11>] kasan_check_read+0x11/0x20 mm/kasan/kasan.c:320
 [<ffffffff826648db>] __copy_to_user arch/x86/include/asm/uaccess_64.h:182 [inline]
 [<ffffffff826648db>] sg_read_oxfer drivers/scsi/sg.c:1978 [inline]
 [<ffffffff826648db>] sg_read+0x124b/0x1400 drivers/scsi/sg.c:520
 [<ffffffff8156d353>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156e8e7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815724c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815724c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
sg_write: data in/out 296463/34 bytes for SCSI command 0xfc-- guessing data in;
   program syz-executor5 not setting count and/or reply_len properly
netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'.
binder: 5067:5074 ioctl 4b6a 20a26000 returned -22
netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'.
binder: 5067:5074 ioctl 4b6a 20a26000 returned -22
kasan: CONFIG_KASAN_INLINE enabled
keychord: invalid keycode count 0
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5104 Comm: syz-executor5 Tainted: G    B           4.9.52-g96a28fc #57
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cded6000 task.stack: ffff8801d6158000
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP: 0010:[<ffffffff82664351>]  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
RSP: 0018:ffff8801d615fbc0  EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900039ed000
RDX: 0000000000000000 RSI: 0000000000000069 RDI: ffff8801d67d4370
RBP: ffff8801d615fcd0 R08: 0000000000000000 R09: ffffed003abd8731
R10: 0000000000000005 R11: ffffed003abd8730 R12: 0000000000001000
R13: 0000000000000000 R14: ffff8801d5ec3960 R15: ffff8801d67d4340
FS:  00007f1e6c559700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a6fa18 CR3: 00000001d1fa3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 ffffffffffffffda ffff8801d67d4358 ffff880100000069
 ffff8801d615fe38 ffff8801d67d4368 000000000000008d ffff8801cded6000
 ffff8801d1be1900 1ffff1003ac2bf84 000000002008c000 000000002008c024
Call Trace:
 [<ffffffff8156d353>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156e8e7>] vfs_read+0x107/0x330 fs/read_write.c:475
 [<ffffffff815724c9>] SYSC_read fs/read_write.c:591 [inline]
 [<ffffffff815724c9>] SyS_read+0xd9/0x1b0 fs/read_write.c:584
 [<ffffffff838ac645>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 19 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 06 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 
RIP  [<ffffffff82664351>] sg_read_oxfer drivers/scsi/sg.c:1976 [inline]
RIP  [<ffffffff82664351>] sg_read+0xcc1/0x1400 drivers/scsi/sg.c:520
 RSP <ffff8801d615fbc0>
netlink: 6 bytes leftover after parsing attributes in process `syz-executor6'.
---[ end trace 2582fd5bd52772b0 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/10/04 09:14 https://android.googlesource.com/kernel/common android-4.9 96a28fcc7c92 c26ea367 .config console log report ci-android-49-kasan-gce
* Struck through repros no longer work on HEAD.